 The main storyline opens with Jack and Stephanie, a bickering young couple, who are lost while driving through the backwoods.We soon learn that they are on their way to meet a marriage counselor.After getting bad directions from a state trooper, the couple get into a car accident when they run over some spiked metal in the road, which Jack dismisses as discarded scrap metal; they find another car which has experienced the same fate, but the occupants are missing.